diff --git a/build-portable-artifacts.mjs b/build-portable-artifacts.mjs
index 4c58c19..80a5c2c 100644
--- a/build-portable-artifacts.mjs
+++ b/build-portable-artifacts.mjs
@@ -14,9 +14,10 @@ const output = process.env.out;
 if (!output) throw Error("Missing Nix output");
 const digest = (bytes) => createHash("sha256").update(bytes).digest("hex");
 const generatorDigest = digest(await fs.readFile(config.compiler));
-const runtime = config.portable
-  ? JSON.parse(await fs.readFile(path.join(config.sharedRuntime, "runtime.json"), "utf8"))
-  : { files: [] };
+const runtime =
+  config.portable || config.remote
+    ? JSON.parse(await fs.readFile(path.join(config.sharedRuntime, "runtime.json"), "utf8"))
+    : { files: [] };
 const relative = (p) => compiler.artifactPath(p);
 const implementations = [];
 const generated = new Map();
@@ -42,12 +43,15 @@ const coreURL = coreFile ? compiler.contentArtifactUrl(coreFile) : null;
 const coreServer = path.join(config.sharedRuntime, "core.mjs");
 await fs.mkdir(path.join(output, "share/quixos/generated"), { recursive: true });
 const portable = config.portable;
-if (portable && !/^[$A-Z_a-z][$\w]*$/.test(portable.registryExport))
-  throw Error("Registry export must be a JavaScript identifier");
+for (const settings of [portable, config.remote].filter(Boolean))
+  if (!/^[$A-Z_a-z][$\w]*$/.test(settings.registryExport))
+    throw Error("Registry export must be a JavaScript identifier");
 const targets = portable ? [...new Set([...portable.targets, "server"])] : [];
-for (const target of targets) {
+const builds = targets.map((target) => ({ target, mode: target, settings: portable }));
+if (config.remote) builds.push({ target: "server", mode: "remote", settings: config.remote });
+for (const { target, mode, settings } of builds) {
   if (!["browser", "server"].includes(target)) throw Error(`Unsupported JS build target ${target}`);
-  const work = path.resolve(`work-${target}`);
+  const work = path.resolve(`work-${mode}`);
   await fs.cp(config.source, work, { recursive: true, dereference: false });
   const writable = async (directory) => {
     await fs.chmod(directory, 0o755);
@@ -69,13 +73,16 @@ for (const target of targets) {
   }
   await fs.symlink(config.core, path.join(modules, "@quixos/camino-replica-core"));
   await fs.writeFile(path.join(work, "package.json"), JSON.stringify({ type: "module" }));
-  const bindingPath = relative(portable.bindingOutput);
-  const source = compiler.generatePortableTypeScriptBindings(plan.definition.bindingSchema, pkg.revision, { target });
+  const bindingPath = relative(settings.bindingOutput);
+  const source =
+    mode === "remote"
+      ? compiler.generateRemoteTypeScriptBindings(plan.definition.bindingSchema, pkg.revision)
+      : compiler.generatePortableTypeScriptBindings(plan.definition.bindingSchema, pkg.revision, { target });
   await fs.mkdir(path.dirname(path.join(work, bindingPath)), { recursive: true });
   await fs.writeFile(path.join(work, bindingPath), source);
-  generated.set(target, { file: path.join(work, bindingPath), source });
-  await fs.writeFile(path.join(output, "share/quixos/generated", `${target}.ts`), source);
-  const entry = relative(portable.entry);
+  generated.set(mode, { file: path.join(work, bindingPath), source });
+  await fs.writeFile(path.join(output, "share/quixos/generated", `${mode}.ts`), source);
+  const entry = relative(settings.entry);
   execFileSync(
     config.node,
     [
@@ -96,7 +103,8 @@ for (const target of targets) {
     ],
     { cwd: work, stdio: "inherit" },
   );
-  const bundlePath = `share/quixos/portable/${target}/module.mjs`;
+  const bundlePath =
+    mode === "remote" ? "share/quixos/remote/server/module.mjs" : `share/quixos/portable/${target}/module.mjs`;
   await fs.mkdir(path.dirname(path.join(output, bundlePath)), { recursive: true });
   const coreImport = target === "browser" ? coreURL : coreServer;
   const metadata = path.join(work, "bundle-meta.json");
@@ -117,7 +125,7 @@ for (const target of targets) {
   );
   const meta = JSON.parse(await fs.readFile(metadata, "utf8"));
   const built = Object.values(meta.outputs).find((o) => o.entryPoint);
-  if (!built?.exports.includes(portable.registryExport)) throw Error("Bundle lacks the declared registry export");
+  if (!built?.exports.includes(settings.registryExport)) throw Error("Bundle lacks the declared registry export");
   // Portable modules must contain their ordinary source dependencies and share only the checked SDK.
   if (
     Object.values(meta.outputs).some((o) =>
@@ -131,15 +139,19 @@ for (const target of targets) {
   )
     throw Error("Unexpected external import in portable module");
   const exports = pkg.exports
-    .filter((e) => e.execution.kind !== "remote" && e.execution.targets.includes(target))
+    .filter((e) =>
+      mode === "remote"
+        ? e.execution.kind === "remote"
+        : e.execution.kind !== "remote" && e.execution.targets.includes(target),
+    )
     .map((e) => e.id);
   const body = {
-    id: `${target}-module`,
+    id: `${mode}-module`,
     target,
     compatibility: "quixos-js-module-v1",
     path: bundlePath,
     ports: "quixos-transaction-ports-v1",
-    registryExport: portable.registryExport,
+    registryExport: settings.registryExport,
     exports,
     files: [await recordFile(bundlePath, "text/javascript"), ...sharedFiles],
   };
@@ -153,13 +165,32 @@ if (config.service.entry) {
     throw Error("Custom service entry must be JavaScript; use a separate typed/language build before packaging");
   serviceEntry = path.join(config.source, relative(config.service.entry));
 } else {
-  if (!portable) throw Error("Generated service requires a portable registry");
-  if (pkg.exports.some((e) => e.execution.kind === "remote" || !e.execution.targets.includes("server")))
+  const modules = implementations.filter((implementation) => implementation.target === "server");
+  if (pkg.exports.some((entry) => !modules.some((module) => module.exports.includes(entry.id))))
     throw Error("Generated service does not cover every package export; provide a custom service");
+  if (!modules.length) throw Error("Generated service requires a checked registry");
   serviceEntry = path.resolve("service-entry.mjs");
+  const imports = modules
+    .map(
+      (module, index) =>
+        `import { ${module.registryExport} as registry${index} } from ${JSON.stringify(path.join(output, module.path))};`,
+    )
+    .join("\n");
   await fs.writeFile(
     serviceEntry,
-    `import { ${portable.registryExport} as registry } from ${JSON.stringify(path.join(output, "share/quixos/portable/server/module.mjs"))};\nimport {servePortableRegistry} from ${JSON.stringify(config.serviceAdapter)};\nservePortableRegistry(registry);\n`,
+    imports +
+      `\nimport {servePortableRegistry} from ${JSON.stringify(config.serviceAdapter)};
+const registries = [${modules.map((_, index) => "registry" + index).join(",")}];
+const owners = new Map();
+for (const registry of registries) for (const id of registry.exports) {
+  if (owners.has(id)) throw Error("Duplicate registry export " + id);
+  owners.set(id, registry);
+}
+servePortableRegistry({exports: [...owners.keys()], invoke(request, channel, context) {
+  const registry = owners.get(request.exportId);
+  if (!registry) throw Error("Unknown export");
+  return registry.invoke(request, channel, context);
+}});\n`,
   );
 }
 const serviceModule = "share/quixos/service/main.mjs";
diff --git a/portable-artifacts.nix b/portable-artifacts.nix
index 9d050e4..2fbe763 100644
--- a/portable-artifacts.nix
+++ b/portable-artifacts.nix
@@ -9,6 +9,7 @@
   typescript ? core.dependencies,
   packageRevisionId,
   portable ? null,
+  remote ? null,
   service ? { },
   nodeModules ? null,
 }:
@@ -40,6 +41,15 @@ let
                 "server"
               ];
           };
+      remote =
+        if remote == null then
+          null
+        else
+          {
+            inherit (remote) entry;
+            registryExport = remote.registryExport or "registry";
+            bindingOutput = remote.bindingOutput or "src/gen/remote.ts";
+          };
       node = "${pkgs.nodejs_24}/bin/node";
       tsc = "${typescript}/node_modules/typescript/bin/tsc";
       esbuild = "${pkgs.esbuild}/bin/esbuild";